Separable fastener



June 16, 1931. G. SUNDBACK SEPARABLE FASTENER Original Filed Sept. 22, 1926 INV TOR. v Gideon Sandbacle. BY

A TTORNEY.

Patented June16, 1931 UNITED STATES PATENT OFFICE GIDEON SUNDBACK, OF MEADVILLE, PENNSYLVANIA, ASSIGNOR TO HOOKIJESS FAS- TENER COMPANY, OF MEADVILLE, PENNSXLVAN IA, A CORPORATION OF PENNSYL- 'VANIA sEPAnABLE FASTENER Original application flled September 22, 1926, Serial No. 137,018, and in Great Britain September 22, 1927.

My invention relates to separable interlocklng fasteners and has for its main object to provide a novel, and in some respects, im-

provedmeans for attaching the-fastener ele- '5 ments tcf the flexible stringers.

This is a divisionof my Patent No. 1,746,565, February 11, 1930. I

' A further object is to provide improved flexible .covering means for the fastener elements to form a smooth continuous track for the slider and to hide the fastener elements from view. i

A more specific object is to provide a beaded edge on a flexible fastener stringer for holding the fastener elements which conof the fastener elements.

Fig. 4 isafragmentary view illustrating the single corded edge stringer of my invention.

Fig.5 is a perspective view with parts in section, of a modified fastener stringer embodying my invention..

Fig. 6 is a cross-sectional view through the fastener and slider of Fig. 1.

The fastening device illustrated in Fig. 1 as is usual in the art, comprises a pair of flexible stringers or tapes 6 and 7 havingattached thereto along their adjacent longitudinal edges fastener elements 8 and 9 respectively. A slider 10 is actuated by a pull member 11 along the fastener elementsto 0 en and close them progressively as'more ful y illustrated and described in my atent above referred to. As best illustrate in Figs. 2 and 3, each of the fastener elements has an attaching or Wings of the slider are of like construction opposite side ofthe other wing and passes Fig. 3 is a detail perspective view of one Divided and this application filed February 5, 1930. Serial No. 426,014.

clamping portion 12 which is b nt around the beaded or corded edge 13 of the flexible stringer so as securely to hold the fastener element on its stringer. In. this particular type of fastener, a flexible covering strip 14 is attached to each stringer adjacent the-fastener elements which extends over the fastener-elements and has a corded edge 15 at its other end which may be connected to theouterends of the; fastener elements. The fastener elements and the flexible covering strips'areso formed as to provide shallow curved grooves '16 constituting a slider track way on opposite sides of the stringer to receive and guide. the correspondingly curved wing portions 17 of the slider which are con nected by an integral portion 18 'not fully shown in Fig;\l but indicated in dotted lines in Fig. 6. It will be understood that the two except that one wing has 2. lug 30 for connection with the pull 11. The connecting portion 18 joins one side of one wing'with the between the separated stringers during movement of the slider.

The slider in moving along the stringers, thus guides the fastener elements together and forces them into interlocking relation when moving in one direction and when moving in-the opposite direction, the connecting portion 18 serves to separate the fastener elements as and more fully described in my Pat- .ent No. 1,746,565.

The construction of the flexible stringer is shown in more detail in Fig. 4. Such a stringer preferably comprises a thin fabrictape 19 which may be sewed or otherwise connected to the article to .be fastened and a single cord 20 or other type of enlargement disposed wholly on one side of the tape and along one of its longitudinal edges. The cord is preferably secured to the fabric tape by stitching and is not inclosed by the. material of the tape as is common in,the art. In my Patent No. 1,243,458, dated October 16, 1917, I have disclosed and claimed a flexible stringer having a cord disposed on each side and sewed to the fabric instead of bein inclosed by the fabric; The advantages 0 the sewed-on cords are explained in this patent and have been well demonstrated by several years of commercial use. By the present invention many of the advantages of the double sewed corded edge are obtained by a single corded edge with the cord sewed .on.

' and at the same time, the construction is made tener element.

cesses areadapted to interlock w1th corresimpler with accompanying advantages from the standpoint of production which will be readily apparent.

In Figs. 1 to 3 inclusive, the fastener elements 9 on the stringer 7 each comprises an interlocking projection 21 adapted to be received and held in a cooperating longitudinal recess 22 in one of the cooperating fasteneri elements 8. .These elements are preferably made from sheet metal and possessenough resiliency to allow them to be snapped together.

In Fig. 5 there is illustrated asomewhat modified construction of the fastener elements. The fabric tape 23 has a cord 24 sewed along one edge and a series of fastener elements 25 have clamping portions 26 in the form of spaced jaws which embrace and clamp the corded edge. These clamping jaws are similar to the ones now employed in commercial fasteners. In the fastener elements here shown each has a central interlocking portion comprising a projection 27 and a recess 28 on opposite sides of the fas- The'se projections and responding projections and recesses on fastener elements of the cooperating stringer,

the interlocking being accomplished on the same principle as in my Patent No. 1,219,881, March 20, 1917. As in the other embodiment, the fastener shown in Fig. 5 has a flexible covering strip 29 attached to the stringer 23 and. connected to the outer ends of the fastener elements by the clamping portions 30 engaging the corded edge 31 which maybe similar in construction to corded edge 24.

As a result of my invention it will be observed that a novel attaching means in the.

vised within the scope of my invention as defined in the appended claims.

What I claim as my invention is:

1. In a fastening device, a pair of flexible strips of material each having a beaded edge, said beaded edge comprising an enlargement disposed wholly on one side of and along the edge of each strip, and a series of fastener elements carried by each strip, each of said stringers each comprising a flexible strip having a beadededge, said beaded edge consisting of a single cord disposed wholly on one side of said strip, and a series of fastener elements on each stringer having attaching portions engaging around said single corded edge.

4. In a fastening device, a pair of fastener stringers each comprising a fabric tape having a beaded edge, said beaded edge consisting of a single cord disposed wholly on one side of said tape and secured thereto by stitching, and a series of fastener elements on each stringer having attaching portions engaging said beaded edge.

5. In a fastening device, a pair offastener stringers each having a beaded edge consist-' ing of a single cord disposed wholly on one side of said stringer, and a series of spaced fastener elements on each stringer, each of such elements having clamping jaws on opposite sides of said beaded edge for securing the elements to their stringer.

6. In a slide fastener, a pair of stringers each comprising a flexible fabric tape having a beaded edge consistin of a single cord sewed on one side of saicI strip, and a series of fastener elements on each stringer having attaching portions clamped to said beaded edge and portions forming a slider trackway,

and a slider movable along said slider trackway for interlocking and releasing said fastener elements; p

7. In a slide fastener, a pair of flexible stringers for attachment to an article to be fastened, a series of metal fastener elements attached to a longitudinal edge of each stringer and projecting outwardly therefrom, flexible covering strips attached to said stringers and extending over said fastener elements to provide a smooth continuous track for a slider and to hide the fastener elements. from view when the fastener is closed, and a slider embracing said elements and covering strips to control engagement of said elements.

In testimony whereof I affix my signature;

GIDEON SUNDBACK. 

